Controllable pitch propeller arrangement

Details Controllable pitch propeller arrangement Controllable pitch propeller arrangement

1998-01-08

1999-10-19

Ryznic, John E.

Fluid reaction surfaces (i.e., impellers)

Actuation directly responsive to magnetic or electrical effect

416155, F03G 700, B63H 106

Patent

active

059677490

ABSTRACT:
In the particular embodiments described in the specification, a controllable pitch propellor arrangement includes a plurality of propellor blades supported from a central hub which is rotatably mounted on a shaft in which each blade is pivotally supported from the central hub. Two radial pins extending from the outer ends of each of the blades are received in corresponding rims having peripherally disposed permanent magnet arrays. The rims are rotated to drive the propellor by energization of coils in a stator assembly surrounding the rims and the pitch of the blades is changed by changing the phase relationship of the current supplied to the stator coils to change the angular relation of the rims.

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